Hummer 2007 H2 Owner's Manual page 76

To remove the child restraint, just unbuckle the
vehicle's safety belt and let it go back all the way.
The safety belt will move freely again and be
ready to work for an adult or larger child
passenger.
If you had turned the airbag off with the switch,
remember to be sure to use the airbag off switch to
turn on the right front passenger's airbag when
you remove the child restraint from the vehicle
unless the person who will be sitting there
is a member of the passenger airbag risk group.
See Airbag Off Switch on page 84.
76
CAUTION:
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If the right front passenger's airbag is
turned off for a person who is not in a risk
group identified by the national
government, that person will not have the
extra protection of an airbag. In a crash,
the airbag will not be able to inflate and
help protect the person sitting there. Do
not turn off the passenger's airbag unless
the person sitting there is in a risk group.
See Airbag Off Switch on page 84 for
more on this, including important safety
information.